Supercharged water cooled internal combustion engine

ABSTRACT

A water cooled internal combustion engine with a cooling blower arranged at one end face of the engine and with at least one water cooler which is acted upon by the cooling blower and extends alongside the engine. The internal combustion engine is supercharged and equipped with a supercharger air cooler arranged below the water cooler and parallel to the central axis of the engine. The cooling air delivered by the cooling blower passes through the supercharger air cooler in a direction perpendicularly with regard to the central axis of the engine. The supercharger air cooler has a gap of its own for the discharged air which has an exit parallel to the discharged air of the water cooler.

This is a division of co-pending application Ser. No. 501,214-- Mettig--filed Aug. 28, 1974, now U.S. Pat. No. 3,976,041--Mettig et al issuedAug. 24, 1976 and belonging to the assignee of the present invention.

The present invention relates to a water cooled internal combustionengine with a cooling blower arranged at an end face of the internalcombustion engine and with at least one water cooler which is actuatedby the cooling blower and which extends alongside the internalcombustion engine.

According to German Pat. No. 18 11 710 it is known with water cooledreciprocable piston internal combustion engines to provide a watercooler parallel to the cylinder row while a cooling blower arranged atthe end face of the reciprocable piston internal combustion engineprovides for a horizontal through-flow of the water cooler. With thistype of internal combustion engines, a self intake engine withoutsupercharge is involved and consequently without air cooling of thecharge. This patent, however, does not refer to the arrangement ofcoolers for charging air alone or in combination with water coolers.

It has furthermore become known according to German OffenlegungsschriftNo. 17 51 209 with an air cooled reciprocable piston internal combustionengine to provide two charge coolers which extend in a flat form alongthe cylinder rows and confine a V-shaped space. While this reciprocablepiston internal combustion engine has charge coolers, it has nomotor-water coolers because an air cooled engine is involved. Thedifficulties encountered when providing charge air coolers incombination with motor water coolers are therefore not suggested by saidGerman offenlegungsschrift.

It is an object of the present invention to provide a space-savingarrangement of supercharger intercoolers and water coolers with aninternal combustion engine, in which these structural elements form aunit with the internal combustion engine while the dimensions of theinternal combustion engine are only slightly changed.

This object and other objects and advantages of the invention willappear more clearly from the following specification in connection withthe accompanying drawings, in which:

FIGS. 1 and 2 respectively illustrate in cross section and longitudinalsection a water cooled reciprocable piston internal combustion enginewith cylinder rows located in V arrangement with regard to each otherand provided in conformity with the invention with water coolers andsupercharged air coolers or supercharger intercoolers which are passedthrough vertically.

FIGS. 3-5 respectively illustrate partially in cross section andpartially in longitudinal section a water cooled reciprocable pistoninternal combustion engine with cylinder rows in V arrangement and withwater coolers and supercharger air coolers passed through horizontally.

FIG. 6 shows in partial cross section a water cooled reciprocable pistoninternal combustion engine with in-line cylinders and with built-onwater cooler and supercharger air coolers.

The water cooled internal combustion engine according to the presentinvention includes a cooling blower arranged at one end face of theengine and with at least one water cooler which is actuated by thecooling blower and which extends alongside the internal combustionengine. The present invention is characterized primarily in that theinternal combustion engine is equipped with a supercharger air cooler orintercooler and that the supercharger intercooler is arranged below thewater cooler parallel to the central axis of the engine. The internalcombustion engine according to the present invention is furthermorecharacterized in that the cooling air delivered by the cooling blowerpasses through the supercharger air cooler or intercooler in a directionperpendicular to the central axis of the internal combustion engine,while the supercharger air cooler or intercooler has a gap of its ownfor the air to be discharged, said gap having its mouth parallel to thedischarge air of the water cooler.

Due to separate air discharge passages for the water cooler and thesupercharger air cooler or intercooler, it is possible for both heatexchangers to obtain a good degree of efficiency. In as much as thedischarge air passage of the supercharger air cooler furthermore in theimmediate vicinity of the cooling air exit surface of the water coolerends parallel to said cooling air exit surface, the cooling air can bewithdrawn through a common discharge air passage which is of particularimportance when the internal combustion engine is built into ships,locomotives, etc.

For a water cooled reciprocable piston internal combustion engine withthe cylinder rows in V arrangement in which above each cylinder rowthere is provided a water cooler, it is furthermore suggested that thewater coolers are passed through vertically and that the superchargerintercoolers are arranged between the water coolers and the internalcombustion engine and are passed through vertically while the dischargepassage of the supercharger intercooler leads into the gap between thewater coolers. The main feature of this invention is seen in the closedwithdrawal of the cooling air of the motor cooling water together withthe cooling air for the supercharged air in a cross section in upwarddirection outside the motor plan without employing cross sectionalsurfaces for the cooling air withdrawal. Such an arrangement isadvantageous for many instances, for instance when installing the enginein ships, because for the withdrawal of the cooling air no surfaces areemployed which go beyond the plane view of the motor. According to afurther embodiment of the invention, it is provided that each cylinderrow has a supercharger intercooler of its own which is arranged abovethe intake pipe and parallel to the latter and by means of a deviatingelbow is connected with said supercharger intercooler. The charging airwhich is delivered by a waste gas turbo charger passes through thesupercharger intercooler in cross flow to the cooling air and finallypasses into the line for the supercharged air from where it passes intothe cylinder heads. In this way, the supercharger intercooler can bearranged close to the internal combustion engine. A further modificationof the invention with cylinder rows in V arrangement, in which aboveeach cylinder row there is provided a water cooler, provides that thewater cooler and the supercharger intercooler are passed throughhorizontally while the supercharger intercoolers are arranged in theregion of the water coolers facing the internal combustion engine andbetween said water coolers, and while the discharging air passage ofeach supercharger intercooler leads into a gap between the water coolerand the internal combustion engine. This arrangement is advantageouswhen lateral discharge possibilities for the discharge air are providedand the vertical space is limited.

Furthermore, for a water cooled reciprocable piston internal combustionengine with in-line arrangement of the cylinders it is suggested thatthe water cooler is arranged in spaced relationship to the cylinder rowso as to be flush with the upper edge of the internal combustion engineand is vertically passed through. The reciprocable piston internalcombustion engine of this type is furthermore characterized in that thesupercharger intercooler is located approximately along the anglebisecting line between the water cooler and the vertical line of theinternal combustion engine and at an incline is passed through outwardlyand upwardly while the collecting chamber for the discharge air of thesupercharger intercooler leads into a gap between the water cooler andthe internal combustion engine.

Referrring now the drawings in detail, FIG. 1 is a view of the outputside of the internal combustion engine according to the invention with across section through the cooling installation.

FIG. 2 shows a side view with the longitudinal section through thecooling installation. A reciprocable piston internal combustion engine 1with cylinder heads 2 has for each cylinder row a supercharged airconduit 3 located in the V-space defined between cylinder rows.Connected to each conduit 3 is an air cooled supercharger intercooler 4which through a deviating elbow 5 communicates with the conduit 3 andthrough an elbow 6 communicates with the blower of the waste gas turbocharger 7. For each cylinder row there is furthermore provided a watercooler 8 of its own for back cooling the motor water. The water coolers8 are flat and connected above the cylinder heads 2. Between the watercoolers 8 and along the internal combustion engine there is provided agap 19. Between the water cooler 8 and the cylinder heads 2 there arearranged lateral plates 18 while on the end faces there are providedcover plates 11 and 12. The cooling air is in the illustrated exampledelivered through a mechanically hydraulically driven cooling air blower13 which is built into the cover plate 11. This cooling air blower 13 isdriven through an angle transmission 14 and 15 and a control clutch 16.Above the supercharger cooler 4 there is provided a discharge airpassage 19a which is formed by a partition 20, lateral guiding plates20a, and the cover plate 12 and leads into the gap 19. The coolers 4are, as will be evident, acted upon from below by cooling air whichpasses vertically through the supercharger intercoolers and exits abovethe same by the cooler water coolers 8. The supercharged air passesthrough the coolers in longitudinal direction and at the end of thecoolers is passed by the elbow 5 to the conduits 3 from where thesupercharged air enters the cylinder heads 2. The space between thecoolers 4 and the engine 1 is confined horizontally merely by thelateral plates 18 and the cover plates 11 and 12 so that the cooling aircan freely flow to the coolers 4 and the water coolers 8. The ratio ofthe through-flow voluminae through the coolers 4 and 8 is determined bythe magnitude of the gap 19.

FIG. 3 represents the output side of the reciprocable piston internalcombustion engine with a cross section through the motor cooler passedthrough horizontally. FIG. 4 is a side view with a longitudinal sectionthrough the cooling installation, and FIG. 5 shows the top view of thereciprocable piston internal combustion engine. In this instance, thewater coolers 8 are vertically arranged in such a way that the exitsurfaces for the cooling air do not project beyond the width of theinternal combustion engine. Also the supercharger intercoolers 4 arearranged vertically and substantially parallel to the water cooler 8 andare passed through horizontally. The cooling air of the coolers 4, theinterior of which is actuated by cooling air, exits in conformity withthe invention below the water cooler 8 and parallel to the cooling airof the water coolers 8. The lower confinement of the exit cross sectionis formed by the horizontal surfaces of hoods 9 of the cylinder head.The accumulating chamber for the cooling air which chamber is locatedabout the V-space is closed toward the top by a cover plate 10. Thecover plate 10 may be connected to the upper longitudinal sides of thewater cooler 8. The end faces of the cooling air collecting chamber areclosed in conformity with FIGS. 1 and 2 by the plates 11 and 12. Thedrive of the cooling blower 13 is similar to that of the embodimentsshown in FIGS. 1 and 2.

FIG. 6 illustrates an end view of a reciprocable piston internalcombustion engine with the cylinder arranged in line with a crosssection through the cooling installation. The cooling blower 13 drivenby a V-belt 21 acts upon the supercharger intercooler 4 and upon thenarrow water cooler 8 which extends over the entire motor length. Thesupercharged air is in this embodiment delivered by the non-illustratedwaste gas turbo loader into the collecting line 22 which extends overthe entire length of the cooler 4 and is pressed in a cross flow withregard to the cooling air into the cylinder heads 2. To the lower rim ofthe cooler 4 which rim is located on the output side, there is connecteda discharge air guiding plate 23 which leads to the gap 19 which isconfined in this embodiment by the cylinder head hoods 9 and the watercooler 8. The gap 19 for the cooling air leaving the cooler 4 is asnarrow as possible and is obtainable by the admissible cooling airresistance so that the entire width of the engine will not be enlargedbeyond the diameter of the cooling air blower.

It is, of course, to be understood that the present invention is, by nomeans, limited to the specific showing in the drawings, but alsocomprises any modifications within the scope of the appended claims.

We claim:
 1. A water cooled internal combustion engine having a centralaxis which includes: a cooling blower arranged at one end face of saidengine, at least one water cooler extending alongside said engine andoperatively connected to said cooling blower, a supercharger air coolerarranged underneath said water cooler and in parallel alignment with thecentral axis of said engine, and means for directing the cooling airdelivered by said cooling blower so that said cooling air flows throughsaid supercharger air cooler in a direction perpendicular to the centralaxis of said engine, said supercharger air cooler itself being providedwith a gap forming an exit for the air to be discharged in one commondirection from said supercharger air cooler and extending parallel tothe path of the air to be discharged from said water cooler, cylinderrows in V-arrangement with one water cooler each over each of saidcylinder rows, said water coolers defining a gap therebetween and beingarranged for being passed through by air in vertical direction, saidsupercharger air coolers being arranged between said water coolers andsaid engine for being passed through by air in vertical direction, saidsupercharger air coolers also having discharge passage means leadinginto said gap between said water coolers, supercharged air conveyingconduit means respectively associated with said cylinder rows andlocated therebetween, each cylinder row having a supercharger air coolerof its own arranged parallel to the respective supercharged airconveying conduit means, and deviating elbow means connecting saidsupercharger air cooler to said supercharged air conveying conduitmeans.
 2. A water cooled internal combustion engine having a centralaxis which includes: a cooling blower arranged at one end face of saidengine, at least one water cooler extending alongside said engine andoperatively connected to said cooling blower, a supercharger air coolerarranged underneath said water cooler and in parallel alignment with thecentral axis of said engine, and means for directing the cooling airdelivered by said cooling blower so that said cooling air flows throughsaid supercharger air cooler in a direction perpendicular to the centralaxis of said engine, said supercharger air cooler itself being providedwith a gap forming an exit for the air to be discharged in one commondirection from said supercharger air cooler and extending parallel tothe path of the air to be discharged from said water cooler, cylinderrows in V-arrangement with one water cooler each over each of saidcylinder rows, said water coolers and said supercharger air coolersbeing arranged to be passed through by air horizontally, saidsupercharger air coolers being arranged within that region of said watercoolers which faces said engine and being located between said watercoolers, said water coolers and said engine defining a gap therebetween,and each supercharger air cooler having an air discharge passage leadinginto said gap between said water coolers and said engine.
 3. A watercooled internal combustion engine having a central axis which includes:a cooling blower arranged at one end face of said engine, at least onewater cooler extending alongisde said engine and operatively connectedto said cooling blower, a supercharger air cooler arranged underneathsaid water cooler and in parallel alignment with the central axis ofsaid engine, and means for directing the cooling air delivered by saidcooling blower so that said cooling air flows through said superchargerair cooler in a direction perpendicular to the central axis of saidengine, said supercharger air cooler being provided with a gap formingan exit for the air to be discharged from said supercharger air coolerand extending parallel to the path of the air to be discharged from saidwater cooler, with a row of cylinders, said water cooler being arrangedin spaced relationship to said row of cylinders and substantially inalignment with said engine for being passed through by air in verticaldirection, said supercharger air cooler being located along a linebisecting the angle formed by said water cooler and the vertical planeof said engine and being adapted to be passed through by air at inincline toward the outside and toward the top, said water cooler andsaid engine defining a gap therebetween, and each supercharger aircooler having an air discharge passage leading into said gap betweensaid water cooler and said engine.